function out = count_intervals(y)

current = y(1);
k = 1;

out(1) = 1;

for i=2:numel(y)

	if y(i) == current
		out(k) = out(k) + 1;
	else
		k = k + 1;
		out(k) = 1;
		current = y(i);
	end
end